16-18 Return to Section Topics 2600S-901-01 Rev. C / January 2008
Section 16: Calibration Series 2600 System SourceMeter® Instruments Reference Manual
Models 2635 and 2636:
1. Connect the Series 2600 to the digital multimeter (see Figure 16-2), and select the
multimeter DC current function.
2. Calibrate the low current ranges (100pA, 1nA, 10nA, 100nA
1
)
using a suitably guarded and
characterized 1GΩ resistance standard, such as the Keithley Instruments Model 2600-STD-
RES. (see
Table 16-1, "Recommended calibration equipment" ).Step-by-step procedures,
connection diagrams, and a factory script for calibrating the low current ranges are included
with the Model 2600-STD-RES. The general process entails forcing a characterized voltage
across the 1G
Ω resistor and comparing the 2635/2636 measured results against the
standard resistance and voltage derived current.
a. Characterize the appropriate +/- V source values with the Digital Multimeter according
to
Table 16-4.
b. Characterize the desired Model 2635/2636 current ranges.
Table 16-6
Settings of Model 2635/2636 Characterization of Voltage Source
Low Current Range Voltage Source Compliance
100pA +/- 100.00mV 1.5A
1nA +/- 1.0000mV 1.5A
10nA +/- 10.000mV 1.5A
100nA +/- 100.00V 100mA
1) Connect the guarded resistance standard.
2) Source the appropriate voltage for +/- full scale reading.
3) Wait 30 seconds for stable measurement.
4) Capture the Model 2635/2636 reported current measurement.
5) Initiate HI-Z mode to open the resistor standard (source zero current) and the
characterize offset.
6) Repeat the above steps for each low current range.
Step 4. Contact check calibration (For 2601/2602/2611/2612 only)
a. Short the Series 2600 sense low and output low terminals, as shown in Figure 16-4.
Also short the sense high and output high terminals together, as shown in the figure.
1.The 2601/02/11/12 could be calibrated with this method for the 100nA setting only if desired.
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